An evaluation was conducted of A. yamadagensis, which is a Critically Endangered (CR) species that is endemic to Turkey, comprising an analysis of its taxonomical, micromorphological, macromorphological, cytological and palynological features, in addition to its geographical distribution. Scanning Electron Microscopy was used to obtain seed and pollen surface microphotographs. The shape and sculpturing of the seed periclinal walls are convex and granulose. The shape of the pollen grains appears monocolpate, with polar and equatorial axes of 23.65 ± 0.29 and 14.92 ± 0.33 µm, respectively. A. yamadagensis has a pollen ornamentation that is foveolate-microreticulate. Cytological analyses revealed that A. yamadagensis is diploid and has a chromosome number of 2n = 2x = 16.
Palynological characters of 20 taxa belonging to the Turkish subgenus Cyanus were studied in details using light and scanning electron microscopy. Pollen grains of the subgenus Cyanus were tricolporate or syncolporate, subprolate or prolate-spheroidal, 26.15 to 53 µm in polar size, 22.84 to 46.86 µm in equatorial size, isopolar, and radially symmetrical. The only type of pollen grain ornamentation observed was scabrate-perforate. Principal component analysis and cluster analysis were performed to investigate the relationships of the studied Cyanus taxa. As a result of the phenetic analyses, the polar axis, equatorial axis, colpus length, and apocolpium were found to be significant palynomorphological characteristics for taxonomic use.
Aethionema aytachii Ertuğrul & Hamzaoğlu, a new species from central Anatolia that grows on marly hills in the Ayaş district of Ankara Province (Turkey), is described and its relationships and distinguishing characters from the closest relative A. dumanii are discussed. The shape of pollen grains of A. aytachii is tricolpate, and its seed-coat sculpture is verrucate. Sequence data of the internal transcribed spacer region (ITS) of the new species was used to determine about its phylogenetic relation within Aethionema.
The aim of this study was to document the taxonomical, morphological, anatomical, palynological and cytological characters, and geographical distribution of endemic Aubrieta pinardii Boiss. (Brassicaceae) from Turkey. The description of the taxon was revised as a consequence of comprehensive assessments of many specimens. The surface pictures belonging to seed and pollen of the taxon were obtained by Scanning Electron Microscope. The seed surface ornamentation was rugose. The pollen was radially and isopolar and prolate in forms, with polar axes of 19.52 ± 0.29 μm and equatorial axes of 13.04 ± 0.22 μm, with oval outlines in the equatorial axes, and elliptical in the polar axes. They were three–colpate and colpus sizes varied between 12.98 μm and 13.29 μm in length, and between 1.33 and 2.09 μm in width. Also, the anatomical structures of the root, stem and leaf of species were studied. In cytological studies, the chromosome number of species was found as 2n = 16 (x =8). This was the first work including taxonomical, morphological (macro and micro), anatomical and cytological data of endemic Aubrieta pinardii.
Bangladesh J.Plant Taxon. 27(1): 27-35, 2020 (June)
Alyssum strigosum Banks & Sol. subsp. strigosum and A. strigosum Banks & Sol. subsp. cedrorum (Schott & Kotschy) Dudley, which are two subspecies of Alyssum strigosum with their morphological, anatomical, palynological traits, were presented in detail with this study. The anatomical analysis has been carried out using handmade sections. The transverse sections of roots showed that two subspecies have similar anatomical characters as with primer structure. The sections of stem were reflected the typical dicotyledonous stem anatomical structure and were determined that species have oval shaped cortex parenchyma. The vascular bundles in stem were arranged in one row both examined species. The mesophyll type was detected as equifacial. The examined species have monad, isopolar, prolate and tricolpate pollen grains. For two examined species, exine sculpture were observed as reticulate. As a conclusion, the characteristics of anatomical and palynological in Alyssum strigosum have been showed the supporting the separation of subspecies.
The identification of species based on anatomical characters is valuable to investigate their taxonomic status, phylogeny and understand their autoecology. The current study analysed the stem and leaf properties of 20 species of the subgenus Cyanus (Mill.) Hayek in Turkey. The Cyanus species exhibited xeromorphic anatomical features, such as tight palisade parenchyma and induced spongy parenchyma, which indicated adaptations to the arid soil and a forest ecosystem in which they occurred, as well as to high light intensity and precipitation. Anatomical features such as the midrib shape and number of vascularization patterns differed among the species. Similar anatomical characters were analysed for the investigated species. These properties can provide an important database for future studies including the phylogeny within the subgenus Cyanus. Bangladesh J. Plant Taxon. 28(2): 295-309, 2021 (December)
Draba (kayadolamasi) cinsine ait olan dort taksonun [Draba bruniifolia Steven subsp. bruniifolia (kaya dolamasi), Draba heterocoma Fenzl (tuylu dolama), Draba haradjianii Rech. f. (Hatay dolamasi) ve Draba nemorosa L. (orman dolamasi)] tohum morfolojileri, taramali electron mikroskobu (SEM) ile incelenerek taksonomik karakter olarak onemleri belirlendi. Makro- ve mikromorfolojik karakterleri, tohum rengi, sekli, kanati, olcusu ve tohum yuzey modeli incelendi. Iki tohum yuzeyi modeli (duzensiz-retikulat, duzenli-retikulat ve cukurcuklu) gozlendi ve dort tane de tohum sekli (ovat, dar ovat, eliptik ve genis eliptik) tespit edildi. Sonuclar tohumlarin morfolojik karakterlerinin taksonlarin ayrimina katki saglayabilecegini gostermistir.
Calisma alani Icel ili, Mut ilcesi sinirlari icerisinde yer alan Buyukegri Dagi ve cevresi olup, Davis’in Grid kareleme sistemine gore C4 karesi icerisinde yer almaktadir. Alanda Akdeniz floristik bolgesinin etkisi gorulur. Toplanan bitki orneklerinin teshisi sonucu 22 familyaya ait 50 cins ve 67 endemik takson tespit edilmis olup endemizm orani %20.9’dur. Endemik bitkilerin 1’i CR, 3’u EN, 10’u VU, 8’i NT ve 45’i LC tehlike kategorisinde yer almaktadir. En fazla endemik takson iceren familyalar 10 takson ile Compositae ve 7 takson ile Leguminosae iken en fazla endemik taksona sahip cinsler ise 4 takson ile Astragalus ve 3 takson ile Linaria, Centaurea ve Hypericum cinsleridir.
A new Centaurea species, C. mengenensis Uysal & Şirin, is described and illustrated from Mengen district, Anatolia, based on morphological and molecular data. To identify its taxonomical position within Centaurea , the internal transcribed spacer (ITS) = gene region of the new species was amplified and sequenced. The new species belongs in Centaurea subg. Centaurea as shown by both morphological and molecular data. Its diagnostic characters are presented, including an updated key to related species distributed in Turkey. Additionally, the geographic distribution of the new species, as well as of its relatives, is mapped. The chromosome number of C. mengenensis is 2n = 2x = 18 and its achene surface ornamentation is irregularly sulcate.
